arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2210.01482cs.IR
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基于transformer的Wikipedia列表主题实体检测

Transformer-based Subject Entity Detection in Wikipedia Listings

Nicolas Heist, Heiko Paulheim

摘要:

在问答或文本摘要等任务中,掌握相关实体的背景知识至关重要。在DBpedia或CaLiGraph等公开可用的知识图谱中,关于实体的信息--特别是关于长尾或新兴实体的信息--远远不够完整。在本文中,我们提出了一种方法,利用列表的半结构化性质(如枚举和表)来识别列表项的主要实体(即,的条目和行)。这些实体,我们称之为主题实体,可以用来增加知识图谱的覆盖率。我们的方法使用一个Transformer网络来识别主题实体在令牌级,并超越现有的方法在性能方面,同时受到较少的限制。由于灵活的输入格式,它适用于任何类型的列表,并且与以前的工作不同,它不依赖于实体边界作为输入。我们证明了我们的方法,将其应用到完整的维基百科语料库,并提取4000万提到的主题实体,估计精度为71%,召回率为77%。结果被纳入最新版本的CaLiGraph。

英文摘要:

In tasks like question answering or text summarisation, it is essential to have background knowledge about the relevant entities. The information about entities - in particular, about long-tail or emerging entities - in publicly available knowledge graphs like DBpedia or CaLiGraph is far from complete. In this paper, we present an approach that exploits the semi-structured nature of listings (like enumerations and tables) to identify the main entities of the listing items (i.e., of entries and rows). These entities, which we call subject entities, can be used to increase the coverage of knowledge graphs. Our approach uses a transformer network to identify subject entities at the token-level and surpasses an existing approach in terms of performance while being bound by fewer limitations. Due to a flexible input format, it is applicable to any kind of listing and is, unlike prior work, not dependent on entity boundaries as input. We demonstrate our approach by applying it to the complete Wikipedia corpus and extracting 40 million mentions of subject entities with an estimated precision of 71% and recall of 77%. The results are incorporated in the most recent version of CaLiGraph.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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